摘要
本文论述了射线层析成象和衍射层析成象的原理和基本算法,介绍了射线成象的投影层析定理、衍射成象的付氏投影定理以及用于衍射成象的插值法、滤波—逆投影法和既可用于射线成象又可用于衍射成象的代数重构法。其原理既适用于地震波成象技术,也适合于电磁波成象技术。此外,还介绍了地球物理井间层析成象在地球物理勘探、油藏工程、工程地质等方面的应用及其最近的发展。
By geophysical tomography is meant reconstruction of an object from a set of its projects. It is emerging as an imaging method for determining subsurface structure. This paperdescribes basic theory and algorithms for both ray tomography and diffractiontomography. Projection slice theorem (or Fourier slice theorem) for ray tomography andFourier transform for diffraction tomography is presented. Tomography algorithms havethree basic kinds. The first one of them is filtered-back projection algorithm, the otherone is extrapolation and interpolation methods and filtered back propagation algorithmand the third one is ART(algebraic reconstruction technique) which are useful for both rayand diffraction tomography. The principles given here are applicable to tomographic mapping of seismic and electromagnetic waves. Moreover, applications of crossholetomography to seismic exploration, reservoir engineering and engineering geology andothers are put forward. Some developments of the geophysical tomography in recent yearsare also mentioned.
出处
《江汉石油学院学报》
CSCD
北大核心
1989年第3期29-40,54,共13页
Journal of Jianghan Petroleum Institute
关键词
层析成像
地球物理勘探
tomography
geophysics
image reconstruction
